just diagnosed with an ovarion cyst

I was just diagnosed with an ovarion cyst A day ago and the doctor doesn't seem very,concerned. All they said was they wanted to look at it again in 8 weeks. I've been having,lower abdominal pain and pressure for a long time along with nausea every night for 4 years now. I was first prescribed zantac due to a LOT of heart burn to go along with this and possibly an ulcer. After about 2 weeks of taking that I got flu like symptoms like nausea really bad a chilled feeling and then I started to get contraction type things in my upper abdomen immediately followed by nausea. Those contractions lasted about 24 hours. Ever since then (about a week now) I have been drained of all energy, muscle weakness, and just a lot of stomach and lower back pain and discomfort. I can barely drag myself off the couch at times. And although I have had lots of nausea I have yet to vomit at all . Does anybody have any suggestions on what could be going on and is the doctor right to not seem concerned??